Valve-gear.



T. OBRIEN.

VALVE GEAR. Y APPLICATION FILED YEBL 1908.

Patented septh 21, 1909.

VALVE GEAR.

y APPLUATION I'ILIJD 1113.24. 190B.

Patented septh 21. 1909.

2 SHEETS-SHEET 2.

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Y myn/ron YZ0/:zas 0 brzefz B Y Mv ATTUHNEYS- THOMAS OBRIEN, F NEWYORK,4 N. Y.

VALVE-Gans.

Specitlcation o! Letters Patent. .Patpntpd Sept. 215 1909,

v Application led February 24, 1908. Serial No. 417,362.

To r/Il whom it may concern:

Be it known that I, Tnoims O'Bimzx, a

citizen of the United States. and e. resident of the city of New York,boron h of the Bronx, in the county and State of .\e\v York,

have invented a new and Improved Valve- Gear, of which the following isa full, clear, and exact description.

My invention relates tol internal eoiiibus- 10 tion engines, my `.fioreparticular object heing to provide a valve gear so constructed as toreadily permit- 'the removal and replacement of certain valves and theirfittings. More particularly stated my invention comprises a constructionwhereby certain movable valves actuated periodically by :push rods arereadily disconnected from the latter and from their housings. and thusremoved from the engine and easily replaced within the engine byreversing the steps neef. essarpsy to remove them.

Reference is to he had to th'e aceoinpanying drawings forming a part ofthis specilieation. in which similar characters if reference indieateeorresponding parts in all the figures. Figure 1 is a Afragmentary planol a gas engine equipped ivith my invention, this view showing in fulllines the norrna'l position ot' one of the push rods and ot the valvewhich it controls, ar,... ,n dotted lines showing how the removal of avalve and its littings is readily accomplished, and to this end showinghow the push rod is turned out4 of engagement with the valve; Fig. is avertical seetion upon the. line 2--2 of Fig. l. looking in thedirei'tion of the avi-ou, andshoiving one of the pin-:h rods as releasedfrom eeitain looking ineehanisin noriiially holding it. the push rodbeing in this view turned into an abnormal position in order todiseiigage it from the`l valve; Fig. 3 an enlarged cross section-uponthe. lines Il Vl-T of Figs. 1' and 2. looking in the dirention of theari-mrs. and .shoving hoiv the keys extend through .slots in thi pushrods, iherehy preventing he hitter fri-ni tfrning under ordinaryconditions to pr-vent their partial rotation upon removal ot' the. keys,thisI view showing one form of spring loi-lv pose of rai tions; and Fig.i is a fragiz'ientari side eh'- vatnnr showing a slightly modifie-flforni ot' g looking device for holding thekeys in their normalpositions, the view showing other g nnoriiial position.

wise substantially the sanie'pai'ts as indicated iii Fig. 2l.

Mounted upon anengine frame is a cylinder 6 provided with ribs 7 for thepuriating heat in the usual manner. touneeted with the cylinder (i is achest 8 provii'led with passages 9, 10, separated by :i partition 4l1..\t 12 are openings merging into the passages E). 10. A valve easing isshown at 13 and is provided with a portion 13* fitting into one of theopenings 12. The valve easing 13 is provided with a portion 14 servingas an inlet pipe.

Another valve casing is indicated by dotted lines at. 15 and is providedwith a portion 16 serving as an outlet pipe. Valve stems 17, 18 extendinto the 'casing's 13, 15, the latter being provided with necks 19, 20.foi' this purpose. The valves 17 and 18 are rovided with valve members21, 22. whioli move relatively to theehest- 8 so as to open and closethe openings 12. A spiral spi-ing 17 eneireles the valve stem 17 and theneek 19. and a similar spiral spring 17t ent'ii'eles the stem 1S andneck 20. 'Fliese spiral springs abut a't their .smaller ends againsteollars 23, 24 secured. in positionhy nuts 25. :26, the latter beingheldin position hy'tfuslzion nuts Q". 28, which also serve the purposeot' holdin, r the nuts 2li firmly in position.

Mounted upon a framework 2t) is a plate 3() provided ivith a bearing 31iii which is joiiriialed a revohihle shaft 32. This shaft is providedwith vains 33. 33. staggered relatively to eat-h other. Tubulareasings'iil. 35, 36, 3T are fashioned as hearings and mounted ivithinthem are push rods 38, 39;

40. 41. The iush rods are adapted to turn and also lto slidelongitudinally within thestl bearings. The push rods 3P.. 39. 4U, 41 areseverall)v provided with rollers 42 adapted to he engaged in. the earns2l.' 33 for the purpose ol' avtizatiiig tupush rods with a minimum mtrietioii. The caros mei-elf.' press the push rods away. the aetion ofthe springs l. lil being relied upon to retraet them atti-r eat-hminst-d movement bj.' the rams. l'ai-h roller '"3 ioiii'asiiei't Nithina slot 42., 'l'he push rods. 3?* ifi. ll are' for holding the keys intheir normal posi- 1 provided with presser ila-t ich 1. li. ti'graitherewith and gage the vushion nots .tti iri- .so arranged as toeniiliori the parts are 'l'lie push rods are-provinwl 'with slots 47,

l screw lposition, therefore, the action of the engine .57 (or 57) and,the shaft 32 being rotate g 48, 49. 50 disposed diametrically, as willbe 2 understood from Fig. 2. Keys 51, 52, 53, 54 l extend through the-slots 47, 48,' 4Q. 50 and l are removable. When these keys are in iolsiton, the resser feet extend houitihtally, but when t e keys areremoved, the presser feetmay be turned vertically, as will be untdex-stood from Fig. 1. Lugs 55, 56 (sce Fig. 2) support the keys in suchposition that the latter may be readily grasped and removed. Leaf srings 57 are revolubly mounted upon lts 5B and are provided with upfturned ends 59.. By grasping these ends the springs 57 may be turned.Normally the,

springs ress upon the keys, but u )on being turned t iis pressure isreleased an the keys are uncovered. In the form shown in Fig. 4the pushrods 38, 41'* are encircled by casings 34. 36, serving as bearings., andkeys 56 extend I through the ush rods, substantially as above described)with reference to the other views. In this instance, however, the leafspring 57' having uptumed ends 59 is not pressed upon directly by thebolt 58", a s iral spring 60 being disposed intermediate t icsehparts.By `burnin the screw bolt a8" when the parts are first p aced inposition, the s iral spring G0 presses upon the leaf spring, gi. Thespring 57 or 57* is held in position transversely of the casings 34, 35,36 I and 37 by lugs 61 (see Fig. l). v l- The operation of my device isas follows: The keys 51, 52,153, 54 bein in position and held fixedly bypressure o the leaf sprin the cams 33, 33a press against the rollers 42,thereby causing the push rods 38, 39, 40, 41 to travel each in thelongitudinal direction of its own axis so as to actuate this partielllarvalve. When the parts are in normal 1s not greatly different from whatit has been heretofore. Suppose, now, that the operator desires toremove the valve casing 13, together with all parts accompanying it. l

He turns'the spring 57 into the position ini4 dicated at the center inFig. 1 and removes the two keys previously held down by this s ring.This leaves the presser feet 44, 46 ree to turn, and the operator, byturning! either of them, can disengage it from its valve mechanism. Thenby taking hold of the valve casin 13 (or l5) he can remove the vrtvetoget ier with its appurtenances.

To replace these parts he merely places thc casing back in position,turns the presser i action differs slightly from that )ust described. Inthis instance thespiral spring 60 normally presses the spring 57* intoits fixed position, and when the spring 57* is lifted slightly, in orderto turn 1t, the spiral spring (S0 is compressed.

ried by tlie push rods are brought into and out of proper workingrelation to the cam by merelv turning the push rods upon theirrespective axes.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

The combination of a cam, a roller disosed adjacent to said cam andadapted to e engaor d thereby, a push rod rovided with a s ot andsupporting said rallier being disposed adjacent to said cam andsupporting 'said push rod so that the latter may turn upon an axisextendin in the general direction of the length o said push rod, saidfeller being adapted to turn u crossing the neral direction o the axisof said push i' the rotation of said push rod bringing said roller intoand out of proper working relation to said cam, a casing provided with atubular portion encircling said push rodl and 'further provided with akeyway adapted to register with said slot 1n said push rod, a key forextending through said key-way and through said slot, and springmechanism for normally holding said key in saidkey-way and said slot.

In testimony whereof-I have signed my name to this specification in thepresence of two subscribing witnesses.

THOMAS OBRIEN. \Vitnesses: I l

WAL'roN HARRISON, EvnRAnn B. Manslnm..

n an avisA In each form of mydevice the rollers car-

